It's been a while, but I am back!!

It has been a while since I have used myfitnesspal.. I really wish I would have stuck with it.. Last time I was on, I lost 25lbs in 2.5 months. I gained a lot of weight with my pregnancy with my son and this site helped me get it back off. Sadly, I have gained all of it back! And I have big news as well, my long time boyfriend asked me to marry him on our 6 year dating anniversary in July 2013!! We are getting married this July! Only 4 months away!! I need to lose at least 20 pounds as I already bought a dress in a smaller size and I have been slacking!! I can fit into my dress now, but can hardly walk and DEFINITELEY can't sit! Lol. (Don't judge...) I am so excited for our wedding day, but I am in need of lots of motivation and support to get down to my goal weight!! At least 20lbs to lose in 4 months, if not more! I know I can do it, as I have done it before. I have just been slacking and I need to get my act together and start working out and eating better!! Any support and motivation would be great!! Thanks so much!!